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What is the runtime performance cost of a Docker container?
.... frankly, I find them hard to believe (not that I disbelieve that they're what linpack emitted, but that I disbelieve that the test was genuinely measuring nothing but floating-point performance as performed). The major overhead from KVM is in the userspace hardware emulation components (which only...
What does the number in parentheses shown after Unix command names in manpages mean?
... this order is correct and intentional.
Related:
Google search for "linux what does the number mean in parenthesis after a function?" - https://www.google.com/search?q=linux+what+does+the+number+mean+in+parenthesis+after+a+function%3F&oq=linux+what+does+the+number+mean+in+parenthesis+after+a+fu...
In C#, What is a monad?
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Most of what you do in programming all day is combining some functions together to build bigger functions from them. Usually you have not only functions in your toolbox but also other things like operators, variable assignments and t...
Determine what attributes were changed in Rails after_save callback?
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Forget what I said above - it DOESN'T work in Rails 2.0.5. So a useful addition to Rails 3.
– stephenr
Oct 5 '10 at 8:34
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Iterating through a JSON object
...uld really just do:
json_object = json.load(raw)
You shouldn't think of what you get as a "JSON object". What you have is a list. The list contains two dicts. The dicts contain various key/value pairs, all strings. When you do json_object[0], you're asking for the first dict in the list. When you...
What is the difference between Normalize.css and Reset CSS?
I know what CSS Reset is, but recently I heard about this new thing called Normalize.css
9 Answers
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How can I test what my readme.md file will look like before committing to github?
... readme for my github project in the .md format. Is there a way can I test what my readme.md file will look like before committing to github?
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Easy way to pull latest of all git submodules
...s well).
For git 1.7.3 or above you can use (but the below gotchas around what update does still apply):
git submodule update --recursive
or:
git pull --recurse-submodules
if you want to pull your submodules to latest commits instead of the current commit the repo points to.
See git-submodul...
Is the Scala 2.8 collections library a case of “the longest suicide note in history”? [closed]
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I hope it's not a "suicide note", but I can see your point. You hit on what is at the same time both a strength and a problem of Scala: its extensibility. This lets us implement most major functionality in libraries. In some other languages, sequences with something like map or collect would be ...
What's the difference between String(value) vs value.toString()
... object as a number it should has a .valueOf() function defined in it.
what if we have both in one object?
if we want to treat this object as a string => use .toString()
if we want to treat this object as a number => use .valueOf()
what if we only have .valueOf() defined?
.va...